Note 3 - Loans Receivable (Details) - Past Due and Non-accrual Status of Loans - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Construction loans:
Loans, past due	$ 1,926	$ 1,470
Loans, current	379,137	365,888
Loans	381,063	367,358
Loans, nonaccrual	415	426
Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due	664	498
Financing Receivables, 60 to 89 Days Past Due [Member]
Construction loans:
Loans, past due	913	84
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due	349	888
Construction Loan Portfolio Segment [Member] \| Residential [Member]
Construction loans:
Loans, current	10,983	11,779
Loans	10,983	11,779
Construction Loan Portfolio Segment [Member] \| Land Acquisition, Development and Commercial [Member]
Construction loans:
Loans, past due	10	11
Loans, current	30,157	27,429
Loans	30,167	27,440
Loans, nonaccrual	10	11
Construction Loan Portfolio Segment [Member] \| Land Acquisition, Development and Commercial [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due	10	11
Real Estate Portfolio Segment [Member] \| Residential [Member]
Construction loans:
Loans, past due	1,310	347
Loans, current	103,745	99,921
Loans	105,055	100,268
Real Estate Portfolio Segment [Member] \| Residential [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due	495	297
Real Estate Portfolio Segment [Member] \| Residential [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Construction loans:
Loans, past due	815
Real Estate Portfolio Segment [Member] \| Residential [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due		50
Real Estate Portfolio Segment [Member] \| Commercial [Member}
Construction loans:
Loans, past due		836
Loans, current	147,561	140,116
Loans	147,561	140,952
Loans, nonaccrual	360	368
Real Estate Portfolio Segment [Member] \| Commercial [Member} \| Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due		44
Real Estate Portfolio Segment [Member] \| Commercial [Member} \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due		792
Commercial, Industrial and Agricultural Portfolio Segment [Member]
Construction loans:
Loans, past due	201	171
Loans, current	52,712	52,841
Loans	52,913	53,012
Loans, nonaccrual	45	47
Commercial, Industrial and Agricultural Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due	167	52
Commercial, Industrial and Agricultural Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Construction loans:
Loans, past due		84
Commercial, Industrial and Agricultural Portfolio Segment [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due	34	35
Equity Lines Portfolio Segment [Member]
Construction loans:
Loans, past due	403	105
Loans, current	26,551	26,271
Loans	26,954	26,376
Equity Lines Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due		105
Equity Lines Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Construction loans:
Loans, past due	98
Equity Lines Portfolio Segment [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Construction loans:
Loans, past due	305
Consumer Portfolio Segment [Member]
Construction loans:
Loans, past due	2
Loans, current	7,428	7,531
Loans	7,430	$ 7,531
Consumer Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Construction loans:
Loans, past due	$ 2

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
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-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

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